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Technical Briefs

An Experimental Procedure for Determining Both the Density and Flow Rate From Pressure Drop Measurements in a Cylindrical Pipe

[+] Author and Article Information
Ghislain Michaux

 Aix-Marseille Université, IUSTI, UMR CNRS 6585, Technopôle de Château-Gombert, UNIMECA, 60 rue Joliot Curie, 13 453 Marseille, Franceghislain.michaux@univmed.fr

Olivier Vauquelin, Elsa Gauger

 Aix-Marseille Université, IUSTI, UMR CNRS 6585, Technopôle de Château-Gombert, UNIMECA, 60 rue Joliot Curie, 13 453 Marseille, France

J. Fluids Eng 130(9), 094501 (Aug 12, 2008) (3 pages) doi:10.1115/1.2953294 History: Received July 13, 2007; Revised May 14, 2008; Published August 12, 2008

An experimental procedure was developed for determining both the density and flow rate of a gas from measurements of pressure drops caused by an abrupt flow area contraction in a cylindrical pipe. Experiments were carried out by varying the density and flow rate of a light gas mixture of air and helium, spanning a Reynolds number range from 0.2×104 to 3.4×104. From experimental results, a procedure was then proposed for evaluating the density from pressure change measurements in the scope of light gas extraction experiments.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of a typical experimental setup used for light gas extraction experiments on scale down models

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Figure 2

Schematic of the test section showing the abrupt flow area contraction with main dimensions and pressure tap locations

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Figure 3

Schematic of the experimental setup used for experiments on the test section using air and helium mixtures

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Figure 4

Comparison between experimental results and theoretical predictions for pure air showing pressure drop variations with the volumetric flow rate

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Figure 5

Flow coefficient variations with the Reynolds number obtained from experiments for several air and helium mixtures

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Figure 6

Curves plotted from experimental results giving the density as a function of the differential pressure for several volumetric flow rate values

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